Tire-building machine



April'30 1929. c3. F..WIKI,E

TIRE BUILDING MACHINE Filedjpril 192'? 3 Sheets-Sheet GzonczF Mu:

lm/m Aprila. F. WIKLE TIRE BUILDING MACHINE Filed April 4-, 192'? 2'5 Sheets-$11eet ER we WW. M N W m am Fw w E A MM M a A a a H 1 a H 35 Filed April 4, 1927 3 Sheets-Sheet QM. hm @N Y mm W Fw E A m E 6 Y B on v \I 3 1L 1.. E

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Patented Apr. 30, 1929.

UNITED STATES PATENT OFFICE,

GEORGE I. WIKLE, O1 MILWAUKEE, WISCONSIN, ASSIGNOR TO THE IISK RUBBER COMPANY, OF CHICOYEE FALLS, MASSACHUSETTS, A. CORPORATION OF MASSACHU- SETTS.

TIRE-BUILDIN G MACHINE.

Application filed April 4,

' According to one method of building pneumatic tire casings the carcass of the casing is formed upon a relatively flat pulley or former andafter completion is expanded to 5 "tire shape. My invention particularly relates to a device useful in this building method and has for its principal ob'ect the provision of means which will form t e material about the bead cores, preferably acting on both 1 heads simultaneously. Other and further objects will be apparent from the following specification and claims.

In the accompanying drawings, which illustrate one embodimentof my invention,

Figure 1 is a plan view showing the device in operative relation with the pulley or former, the instrumentalities being shown in position to start the operation;

Figure 2 is a side elevation of the strucac ture shown in Figure 1;

Figure 3 is a fragmentary view similar to Figure 1, but showing one of the instrumentalities at'the end of the operation;

Figure 4 is a vertical section of one of the at instrumentalities;

Figure 5 is a section substantially on line 5-5 of Figure 4;

Figure 6 is an enlarged plan view of the device, partly in section, showing the driving mechanism, and,

Figures 7, 8 and 9 are diagrammatic views showing the manner of operation.

Referring to the drawings 1 designates the main frame or housing of the building machine and 2 a conventional pulley or former adapted to be rotated by amotor within the housing. The pulley is secured to its drive shaft by means of a collapsing chuck generally indicated at 3. The housing pulley and chuck ma be of any approved type and as they specifically form no part of my invention further description is believed unnecessary.

In the embodiment illustrated the instru- 1927. Serial No. 180,882.

mounted 'on a stub shaft 9 securedto the housing 1 as by bolts 10. A collar 11 is secured to the shaft 9 between bearings 8 and is provided with stops 12 and 13 The stop 13 is made adjustable, as shown in Figure 2, and serves to accurately position the instrumentalities in operative relation to the building former 2 as shown in Figures 1,- and 2. Stop 12 serves to limit the backward swing of bracket 7 when the latter, with the parts carried thereby, are swung to inoperative position as indicated in dotted line in Figure 2.

The means for forming the material about the beads comprise blades 15 fixed toshafts 16 journaled in arms 17 formed inte ral with shafts 18 journaled in blocks 19 adjustably secured to hollow shaft 5 by locking pins 20. The upper faces of block 19 are extended to form plates 22 in which are cut cam grooves 23. Arms 24 are secured to the lower ends of shaft 16 as by set screws 26 and the free ends of arms 24 are provided with rollers 27 see Figures 3 and 6) riding in grooves 23.

hafts 18 are each provided with spiral gears 28 meshing with spiral gears 29 secured to a shaft 30, passin through hollow shaft 5, and provided at its end with a bearing cap 31 to which is secured an operating handle 32. For convenience of construction gears 28 are housed in plates 33, held inblocks 19 by machine screws 34, and apertured at 35 for the passage of shaft-30. It will be understood that the gears 28 and 29 of the two instrumentalities are oppositely threaded so that the arms 17 rotate in opposite directions as will now be described.

Assuming that a tire carcass includinghead cores 4:1 and tread 42 has been built on former 2, as indicated in Figure 1, and that it is desired to form the extending material 43, which may be so called chafing strips or extensions of the carcass material, about the bead cores, the device of my invention is ositioned adjacent the former as shown in "igure 1. As shown in the latter figure the arms 17 are in their innermost osition with cam rollers 27 at the inner end 0 cam grooves 22. In this position blades 15 overlie the bead cores as best shown in Figure 7. The

former or tire support 2 is now set in rotation and shaft 30 rotated, by means of handle 32, causing arms 17, through rotation of shafts 18 to swing outwardly and downwardlyu Due to'theformation of rooves 23 shafts 16 with blades rotate re atively to arms 17, as the latter move outwardly and downwardly, to cause the ed es of blades 15 to follow the contour of the eads, as shown in Figures 8 and 9, and to form the material 43 completely about the bead cores 41 as shown in Figure 9, the blades 15 having passed underneath the beads as shown in the latter figure and-Figure 3. The instrumentalities are now returned to their initialcentric with the center of shaft 18 the membars 15 will move with the bearing. 'The configuration of the groove-may of course be varied to meet the requirement of varying types of beads and easing construction without de arting from my invention.

Pre erably I so adjust blocks 19 on shaft 5, through locking ins 20, that the are described by the points of the forming members is eccentric to the bead, that is so that the center of the arc traversed b the forming members is above the center 0 the bead so that at the completion of the forming operation the forming members lift the beads slightly from the tire support 2 to thereby strip the bead portion of the casing from the support.

I claim:

1. A device for forming material about the bead of a tire casing comprising a rotatable tire support adapted to support a tire carcass including bead elements and material to be formed thereabout, and a forming member engaging the material above the bead and means to move said member around the bead and between the tire carcass and the support to form the material about the latter, as the tire support is rotated.

2. A device for forming material about the bead of a tire casing comprising a rotatable tire support adapted to support a tire carcass including bead elements and material to be formed thereabout, a formin member engaging the material above the bead, means to move said member bodily around the bead and between the tire carcass and the support, and means to maintain said member in contact with the material during said bodily movement to form the material about the beads as the tire support is rotated.

3. A device for forming material about the beads of a tire casing comprising a rotatable tire support adapted to support a tire carcass including bead elements and material to be formed thereabout, forming members engaging the material above the bead and means to simultaneously move said members around the beads and between the tire carcass and the support to form the material about the latter, as the tire sup ort is rotated.

4. A device or forming material about the beads of a tire casing comprising a rotatable tire support adapted to support a tire carcass including bead elements and material to be formed .thereabout, forming members engaging the material above the beads, means to simultaneously move said members bodily around the beads and between the the carcass and the support and means to maintain said members in contact with the material during said bodily movement to form the material about the beads as the tire support is rotated.

'5. A device for forming material about the beads of a tire casing comprising a rotatable tire support adapted to support a tire carcass including bead elements and material to be formed t ereabout, bearing members mounted for bodily movement about the beads, forming members rotatably mounted in the bearing members, means to simultaneously rotate the bearing members bodily about the beads and means to simultaneously rotate the forming members to move them between the tire carcass and the support relatively to the bearing members to form the material about the beads as the tire support is rotated 6. A device for forming material about the beads of a tire casing comprising a rotatable tire support adapted to support a tire carcass includin bead elements and material to be formed t iereabout, bearing members mounted for. bodily movement about the beads,

forming members rotatably mounted in the bearing members, means to. simultaneously rotate the bearing members bodily about the beads, cam tracks formed in the mountings of the bearin members, and cam followers secured to t is forming members and guided in said cam tracks to simultaneousl rotate the forming members relatively to t e bearing members to move them between the tire carcass and the support, to form the material about the beads as the tire support is rotated.

7. A device for forming material about the beads of a tire casing comprising a rotatable tire support adapted to support a tire carcass including bead elements and material to be formed thereabout, bearin members mounted for bodily movement a out the beads, in an are centered above the center of the beads, forming members rotatably mounted in the bearing members, means to simultaneously rotate the bearing members bodily about the beads, cam tracks formed in the mountings of the bearing members, and cam followers secured to the forming members and guided in said cam tracks to simultaneously rotate the forming members relatively to the bearing members to move them between the tire carcass and the support, to form the material porting the main portion ofthe arms for roabout the beads as the tire support is rotated. tation about an was passing through the bead V 8. A device for forming material around of a tire mounted on the SliPfiOl't. 10

the head of a tire casing comprising a time In testimony whereof ave signed my 5 building sup rt, :1. pair of arms having ofiset name to the above specification.

portions, fol g devices carried between the ofiset' portions of the arms and bearings sup-, GEORGE F. WIKLE. 

